For
example, to evaluate ,
after S( is pasted in the entry line, enter

X X2 , X , 1 , 1 0 ) EXE

One
may also use the alpha key to enter the index as i or k as used more often in
summation notation. For example, to compute the sum of k2 as
k goes from 1 to 10, first select 4: from the CALC menu. Then,
after ( is pasted in the entry line, enter

ALPHA K ^ 2 , ALPHA
K , 1 , 1 0 ) EXE

To
evaluate ,
after ( is pasted in the entry line, enter

ALPHA K ^ 2 , ALPHA K
, 1 , ALPHA N ) EXE

The
Casio can evaluate some basic infinite series, such as a geometric series; for
example, .
After ( is pasted in the entry line, enter